diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2021-02-10 14:56:27 +0300 |
|---|---|---|
| committer | Luca Coelho <luciano.coelho@intel.com> | 2021-02-10 15:37:26 +0300 |
| commit | 874020f8adce535cd318af1768ffe744251b6593 (patch) | |
| tree | 4bfccaf4cb17d1f2128848422444b4505c501801 /drivers/net/wireless/intel/iwlwifi/pcie/trans.c | |
| parent | 806832c9651b3ca051fd785f6d804c17a8bfc5f8 (diff) | |
| download | linux-874020f8adce535cd318af1768ffe744251b6593.tar.xz | |
iwlwifi: pcie: don't disable interrupts for reg_lock
The only thing we do touching the device in hard interrupt context
is, at most, writing an interrupt ACK register, which isn't racing
in with anything protected by the reg_lock.
Thus, avoid disabling interrupts here for potentially long periods
of time, particularly long periods have been observed with dumping
of firmware memory (leading to lockup warnings on some devices.)
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210210135352.da916ab91298.I064c3e7823b616647293ed97da98edefb9ce9435@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/pcie/trans.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c index 16f5757b1260..a73f2c54d446 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c @@ -1972,7 +1972,7 @@ static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans, int ret; struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - spin_lock_irqsave(&trans_pcie->reg_lock, *flags); + spin_lock_bh(&trans_pcie->reg_lock); if (trans_pcie->cmd_hold_nic_awake) goto out; @@ -2057,7 +2057,7 @@ static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans, } err: - spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags); + spin_unlock_bh(&trans_pcie->reg_lock); return false; } @@ -2095,7 +2095,7 @@ static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans, * scheduled on different CPUs (after we drop reg_lock). */ out: - spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags); + spin_unlock_bh(&trans_pcie->reg_lock); } static int iwl_trans_pcie_read_mem(struct iwl_trans *trans, u32 addr, @@ -2296,11 +2296,10 @@ static void iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, u32 reg, u32 mask, u32 value) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - unsigned long flags; - spin_lock_irqsave(&trans_pcie->reg_lock, flags); + spin_lock_bh(&trans_pcie->reg_lock); __iwl_trans_pcie_set_bits_mask(trans, reg, mask, value); - spin_unlock_irqrestore(&trans_pcie->reg_lock, flags); + spin_unlock_bh(&trans_pcie->reg_lock); } static const char *get_csr_string(int cmd) |